"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
function CustomToString(target) {
    target.prototype.toString = function () {
        return JSON.stringify(this);
    };
    Object.seal(target.prototype); // 将对象原型封锁，属性不允许随意的添加删除
}
let Person = class Person {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }
};
Person = __decorate([
    CustomToString
], Person);
const p1 = new Person('张三', 18);
// console.log(p1.toString())  // [object Object]
// console.log(JSON.stringify(p1))  // {"name":"张三","age":18}
console.log(p1.toString());
Person.prototype.x = 99;
